Jeremy Piven is best known as the sharp-tongued Ari Gold on HBO’s Entourage, but today he’s taking a break from berating Vince and the boys to give the YouTube community a glimpse of his softer side by signing on as a Video Volunteers curator. This month, YouTube, Piven and the ONE Campaign are asking you to make videos supporting a nonprofit working on an issue related to global development, such as extreme poverty, access to clean water and sanitation, and preventing disease. With International Women’s Day on March 8 and World Water Day on March 22, it’s an ideal time to tackle some of the problems crippling citizens in developing nations. Piven agrees:Once you’ve created a video for a nonprofit of your choice dealing with global development, submit it to the gadget at www.youtube.com/videovolunteers. Remember: the video has to be about an organization, not just an issue. Piven and the ONE Campaign will pick their top three videos to go on the YouTube homepage at the end of the month. Happy filming!Ramya Raghavan, Nonprofits & Activism Manager, recently watched “Spread the Word to End the Word.”